AnswersFoothill-B Period-Chemistry-2627BCumulative Exam

Cumulative Exam — Cumulative exam Answers

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How does litmus paper identify a base?

A
A base turns red litmus blue.
A
A base turns blue litmus red.
A
A base turns orange litmus red.
A
A base turns yellow litmus blue.
22
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A solution contains 90 mL of methanol, 18 mL of propanol, and 2 mL of diethyl ether. Which is the solvent in this solution?

m
methanol
p
propanol
d
diethyl ether
w
water
23

Which statement accurately describes part of the dissolving process of a polar solute in water?

S
Solute molecules repel water molecules.
W
Water molecules surround solute molecules.
W
Water molecules are strongly attracted to nonpolar substances.
S
Solute molecules remain concentrated in one part of the solvent.
24

The equivalence point in a titration refers to the point when

t
the mL of the acid equals the mL of the base.
t
the molarity of the acid used in the reaction equals the molarity of the base used in the reaction.
t
the number of moles of one reactant reacts completely with the moles of the other reactant.
t
the acid in the flask turns clear.
25

best

t
two smaller, more stable nuclei
t
two larger, less stable nuclei
o
one smaller, less stable nucleus
o
one larger, more stable nucleus

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